Air-feeding device



J. Y. KING.

AIR FEEDING DEVICE. APPLICATION FILED, 0:0. 5, 1919.

1,384,838. Patented July 19, 1921.

PATENT, OFFICE.

JOHN Y. KING, OF LANSDOWNE, PENNSYLVANIA.

AIR-FEEDING DEVICE.

Specification of Letters Patent. Patented J ly 19 1921 Application filed December 5, 1919. Serial No. 342,754.

To all whom it may concern:

.Be it known that I, J QHN Y. KING, a citizen of the United States,-residing at Lansdowne, in the county of Delaware and State of Pennsylvania, have invented new and useful Improvements in Air-Feeding Devices, of which the following is a specification.

My invention relates to a new and useful improvement in air feeding devices, and has for its object to provide an exceedingly simpleand effective device of this description which when applied to the door of a coal burning furnace may be adjusted so as to project a jet of highly heated air over the fire bed. in such manner as to intermingle and combine with the gases of combustion in the right proportion to cause said gases to burn with anintense heat and by thus producing perfect combustion prevent the es cape of carbon in the form of smoke or soot.

A further object of my invention is to pro vide for the regulation of the deviceso as to supply a larger quantity of. heated air to the gases arising from the coal bed when the furnace is first'fired or new coal applied thereto.

. A further object of my invention is to provide simple and effective means for bringing about the adjustments which means shall be extended outside of the furnace within easy reach of the fireman. I

With these ends in view, this invention consists in the details of construction and combination of elements hereinafter set forth and then specifically designated by the claims. V

In order that those skilled in the art to which this invention appertains, mayunderstand how to make and use the same, I will describe its construction in detail, referring by numerals to the accompanying drawing forming a part of this application, in which Figure 1, is a broken away section of a portion of a furnacejshowing my improved air feeding device applied thereto the latter being partly broken away and sectioned to clearly show the construction and operating mechanism.

Fig. 2, is an inner end view of an air feeding device.

Fig. 3, is a central section of the hinged valve. j i

In carrying out my invention as here embodied, 1 represents the body of the device attached in any convenient manner to the furnace door 2, and to the inner end of this body is hinged the valve 3, and while this valve may be hinged in any well known or convenient manner I here show it as being hinged between the two lugs 1 formed with the body 1 having a pintle 5 passing through said lugs and the valve so that while the valve is permitted to freely swing it will be accurately guided to and from its seat.

The body 1 has a funnel shaped intake formed therewith which extends outside of the furnace door and leading from this intake is a passageway 7 formed through the body 1 which gradually contracts toward the inner end thereof so as to gradually reduce the volume of air flowing therethrough thereby increasing the speed of said flow from the head of the body, the inner end of the body being squared off to form a seat for the valve 3.

The valve 3 has a hub 8 formed thereon and through the valve hub passes a small front wall of the intake 6 and this rod carries-the ratchet teeth 13 by which it may be locked in several different positions and also has a looped handle formed therewith for easy operation by the fireman, the loop permitting the operation of this red by the poker stoking bar or other implement which may be readily inserted in the loop so as to avoid burning the hands of the fireman.

The rod 11 passes the full length of the passageway 7 its inner ends contacting with the valve 3 so that when the rod 3 is pushed inward to its greatest extent the valve will be forced entirely open so as to permit the outflow of the maximum volume of air to at any degree to permit a greater or lesser flow of air to the furnace.

When the valve is closed the air flowing into the intake and from thence to the passageway 7 will be gradually expanded by the heat absorbed from the'body and thus tially closed to decrease the amount of air 8 coal a relatively large amount of freed'can its speed will be accelerated until finally issuing through the small hole 9 itwill be projected in a jet of high velocity, and in order that this jet may more readily com.-

mingle with the gases of combustion the cross slot 10 is formed across the outlet end of the hole 9 and so proportioned that the issuing of the jet into said slot will permit the air to first spread lengthwise of the slot so as to give a fan shape thereto by the ac tion of the walls of the slot upon the out flowing air,.and I have found this to be more effective in producing perfect combustion.

When a furnace is first fed with fresh bon arises from the coal bed in the form of smoke and to prevent or lessen this smoke a larger amount of air is required to enter the furnace over the fire bed. This I ac-r complish by opening the valve 3 and admitting a relatively large quantity of heated air through the passageway 7, but as. the smoke gradually-diminishes by the increase in heat of the fire'tlie valve may be parfiowing over the fire bed, and finally entirely closed so as to project the fan shaped jet of highly heated air in the burning gases.

While I have shown the body 1' as being curled upward at its inner end it is obvious that it may be made straightthroughout its length or in any other desired shape the principle requirement being that it shall project sufliclently into the'furnace to become intensely heated from the fire bed.

Of course I do not wish to be limited to the exact details of construction as herein shown as these may be varied within the limits of the appended claims without departing from the spirit of my invention.

Having thus fully described my invention, what I claim as new and useful is I '1. Inan air feeding device, arbody having a passageway therethrough, a valve hinged to the inner end of said body adapted to partially close the passageway, a huh I formed upon said valve, said valve and hub door thereof, an air feeding device consisting of a body adapted to be secured to said door and project into the furnace, an intake formed with the body and having a 'hole through its outer wall, an operating rod {passing through said 'hole, teeth formed upon said operating rod for engagement with the walls of said hole, and a valve hinged to the inner end of the body with which the inner end ofthe oper ating rod contacts,

In testimony whereof, I have hereunto ailixed my signature.

JOHN KING.

having a hole therethr0ugh,'said hub hav- 

